fs: remove rimraf's emfileWait option

This commit removes the emfileWait option. EMFILE errors are
now handled the same as any other retriable error.

Refs: https://github.com/nodejs/node/issues/30580
PR-URL: https://github.com/nodejs/node/pull/30644


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>